1 /*
2  * Copyright (C) 2016 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef AAPT_SPLIT_TABLESPLITTER_H
18 #define AAPT_SPLIT_TABLESPLITTER_H
19 
20 #include <set>
21 #include <vector>
22 #include "android-base/macros.h"
23 #include "androidfw/ConfigDescription.h"
24 
25 #include "ResourceTable.h"
26 #include "filter/ConfigFilter.h"
27 #include "process/IResourceTableConsumer.h"
28 
29 namespace aapt {
30 
31 struct SplitConstraints {
32   std::set<android::ConfigDescription> configs;
33   std::string name;
34 };
35 
36 struct TableSplitterOptions {
37   /**
38    * The preferred densities to keep in the table, stripping out all others.
39    * If empty, no stripping is done.
40    */
41   std::vector<uint16_t> preferred_densities;
42 
43   /**
44    * Configuration filter that determines which resource configuration values
45    * end up in the final table.
46    */
47   IConfigFilter* config_filter = nullptr;
48 };
49 
50 class TableSplitter {
51  public:
TableSplitter(const std::vector<SplitConstraints> & splits,const TableSplitterOptions & options)52   TableSplitter(const std::vector<SplitConstraints>& splits,
53                 const TableSplitterOptions& options)
54       : split_constraints_(splits), options_(options) {
55     for (size_t i = 0; i < split_constraints_.size(); i++) {
56       splits_.push_back(util::make_unique<ResourceTable>());
57     }
58   }
59 
60   bool VerifySplitConstraints(IAaptContext* context);
61 
62   void SplitTable(ResourceTable* original_table);
63 
splits()64   std::vector<std::unique_ptr<ResourceTable>>& splits() { return splits_; }
65 
66  private:
67   std::vector<SplitConstraints> split_constraints_;
68   std::vector<std::unique_ptr<ResourceTable>> splits_;
69   TableSplitterOptions options_;
70 
71   DISALLOW_COPY_AND_ASSIGN(TableSplitter);
72 };
73 }
74 
75 #endif /* AAPT_SPLIT_TABLESPLITTER_H */
76